The survey of species belonging to the genera of small ciliate parmeliae in Parque Estadual da Cantareira and surrounding areas revealed the occurrence of two Bulbothrix, one Parmelinella, and four Parmelinopsis species. The species are characterized by foliose thalli with lobes or laciniae, generally < 0.5 cm wide. Bulbothrix has marginal bulbate cilia, Parmelinella simple axillary cilia, and Parmelinopsis simple conspicuous cilia. Medulary chemical constituents are very diverse in Bulbothrix and Parmelinopsis, while salazinic acid predominates in Parmelinella. An identification key, descriptions, comments, and illustrations are provided.